Plowshare-sharpener.



No 775,346. PATENTED NOV. 22, 1904.

L. J. COX.

PLOWSHARB SHARPENER.

APPLICATION FILED JUNE 9, 1904.

NO MODEL.

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m 1 H I 1 Patented November 22, 1904.

PATENT OFFICE.

LEVI J. COX, OF HAVILAND, KANSAS.

PLOWSHARE-SHARPENER.

SPECIFICATION forming part of Letters latent No. 775,346, dated November22, 1904.

Application filed June 9, 1904. Serial No. 211,828. (No model.)

To all whom, it may concern.-

Be it known that I, LEVI J Cox, a citizen of the United States, residingat Haviland, in the county of Kiowa and State of Kansas, have inventedcertain new and useful Improvements in Plowshare-Sharpeners; and I dodeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

This invention relates to a machine for sharpening plowshares.

The object of the invention is to provide a machine of this characterwhereby the operation of sharpening the shares of plows may beconveniently, efiiciently, and expeditiously performed.

In the accompanying drawings, Figure 1 is a front elevation of asharpening-machine embodying my invention. Fig. 2 is a side elevation ofthe same. Fig. 3 is a transverse section on a line through the axes ofthe rolls. Fig. 4: is a front to rear section on the lined 4 of Fig. 1looking toward the fixed table, and Fig. 5 is a bottom plan view of thetable.

Referring now more particularly to the drawings, 1 represents the frameof the machine, which is shown in the present instance in the form of acasting provided at its base with notches or recesses 2, forming flanges3 for the passage of bolts or screws 4 to secure said frame to the flooror a suitable support.

Formed in the frame, on one side of the center line thereof, is avertical slot 5, opening through the same at the front and rear thereof,and in the adjacent side of the frame is a horizontal slot 6, whichcommunicates with said slot 5. The slot 5 forms a receiving space orchamber in which are disposed sharpeningrolls '7 and 8, mounted,respectively, upon shafts 9 and 10, suitably journaled to rotate in theframe 1. The inner portions of the peripheries of these rolls areprovided with spurgear teeth 11 and 12, by which the rolls are gearedtogether to rotate in unison at a uniform rate of speed. The remainingportion of the face or periphery 13 of the roll 7 is smooth-surfaced toits outer end, while the face or periphery 14: of the roll 8 has aninner smooth portion 14., an annular central groove or crease 14S, andan outer corrugated or roughened surface 14. In order to reduce theopposite sides of the share down to a proper inclination and tapered tothe point thereof, the said faces 13 and 14 are tapered outwardly fromthe gear-teeth 11 and 12, thus forming a receiving-space between themfor the admission of the share which gradually increases in width towardthe slot 6.

The shaft 9, carrying the roll 7, is provided at its outer end with anactuating crank-handle 15 and with a pinion 16, which meshes with a gear17 upon the outer end of the shaft 10, carrying the roll 8, by whichmotion may be communicated to the said two shafts in unison. The purposeof the gear-teeth 11 and 12 on the two rolls 7 and 8 is to provide ameshing connection between the same which will adapt them to maintain acertain relation and at the same time prevent any tilting tendency orstrain upon the shafts which might result from the use of the exterioractuatinggearing alone.

The upper edge of the side wall of the frame 1, below the slot 6,supports afeed-table 17, upon which the share is supported while it isbeing sharpened. This table is so mounted that it may be convenientlydetached whenever required, and for this purpose it is provided in itsunder side with arecess 17 to receive the upper edge of said baseportion of the side wall and is provided at the opposite ends of saidrecesses with lugs 18 to interlock with recesses 19 in the side wall andat the outer side of said recess 17 is further formed or provided with ashoulder 20 to abut against the outer surface of the wall and supportthe table against strain in a horizontal or substantially horizontalposition.

In the operation of the machine the share to be sharpened is firstuniformly heated and then rested upon the table 17 with its pointdirected toward the space between the rolls? and 8. Motion is thenimparted to the rolls through the actuating-gearing and the share isforced between the faces 7 and 8 of the rolls and fed up gradually topress or roll the share to an edge to taper and sharpen it to thedesired degree. By this means a plowshare may be conveniently,efiieiently, and quickly sharpened at a minimum expenditure of time andlabor and cost of material.

The corrugated or roughened face 13 of the roll 8 bites into the heatedmetal of the plowshare, and thus serves as a feed-wheel, while thegroove 13 back of the roughened face 13 prevents the share from slidingoutward from between the rolls owing to the fact that the metal ispressed down into the groove or crease 13", thus preventing the sharefrom withdrawal from between the rolls.

From the foregoing description, taken in connection with theaccompanying drawings, the construction and operation of the inventionwill be readily understood without requiring a more extendedexplanation.

Various changes in the form, proportion, and the minor details ofconstruction may be resorted to Without departing from the principle orsacrificing any of the advantages of this invention.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In a machine for sharpening plowshares, the combination of asupporting-frame, tapered sharpening-rolls mounted in said frame, one ofsaid rolls having a roughened or corrugated portion to serve as afeed-rolLand means for simultaneously revolving both rolls,substantially as described.

2. In a machine for sharpening plowshares, the combination of asupporting-frame, tapered sharpening-rolls mounted in said frame, atable projecting outward from the outer edge of the lower roll, saidlower roll having its outer portion roughened to serve as means forfeeding the share and provided with a crease or groove between theroughened portion and the smooth portion of said roll, and means forsimultaneously revolving the rolls, substantially as described.

3. A machine of the character described having tapered pressing-rolls,one of said rolls being provided with means for feeding the sharebetween the rolls and means for preventing the share from sliding frombetween the rolls, and means for revolving both rolls simultaneously.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

LEVI J. COX. Witnesses:

BARD E. MATTHEWS, GEO. KELLY.

